Solve a minor typo in `authsvr-auth0.md`
Solve a minor typo in `authsvr-auth0.md`

Just solve a minor typo in ``authsvr-auth0.md`` file
manfredsteyer/angular-oauth2-oidc,manfredsteyer/angular-oauth2-oidc,manfredsteyer/angular-oauth2-oidc